question archive 2 mol Al This is the mole ratio if Al is the unknown and HCI is the given
2 mol Al This is the mole ratio if Al is the unknown and HCI is the given
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2 mol Al This is the mole ratio if Al is the unknown and HCI is the given. 6 mol HCI In the above example. 2 and 6 are numbers; mol is a label; Al and HCI are substances. For this chapter, the only labels you will be using are mol, g, and L. The fraction above is called a mole ratio. In a mole ratio, the unknown goes on the top of the fraction, and the given goes on the bottom. 1. Use the following equation to answer questions a-d. Do not divide the numbers. 2 Al + 6 HCI - 2 AICl, + 3 H, a. What is the mole ratio if Al is your given and HCI is your unknown? b. What is the mole ratio if HCI is given and Al is unknown? c. What is the mole ratio if Al is given and AlCl, is unknown? d. What is the mole ratio if He is given and Al is unknown?
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The formula is:
mole ratio = molesGivenmolesUnknown?
*coefficients come from the given reaction
a)
2molesAl6molesHCl?
b)
6molesHCl2molesAl?
c)
2molesAl2molesAlCl3??
d)
3molesH2?2molesAl?
Step-by-step explanation
The key was provided at the beginning of the statement
the general form is
mole ratio = molesGivenmolesUnknown?
so
a) Al is given, HCl is unknown
in the equation you have
2 Al + 6HCl
so
2 moles Al
and
6 moles HCl
then
mole ratio = 2molesAl6molesHCl?
b) HCl is given and Al is uknown
the reaction says:
2 Al + 6HCl
2 Al = unknown
6 HCl = given
then
mole ratio = 6molesHCl2molesAl?
c) Al is given and AlCl3 is unknown
the reaction is:
2 Al + 6HCl ==>> 2 AlCl3 + 3 H2
2 AlCl3 = unknown
2Al = given
then
mole ratio = 2molesAl2molesAlCl3??
d) H2 is given and Al is unknown
the reaction is:
2 Al + 6HCl ==>> 2 AlCl3 + 3 H2
from the reaction we know:
2 Al = unknown
3 H2 = given
then
mole ratio = 3molesH2?2molesAl?
